EventEmitter

EventEmitter represents a channel for events.

Overview

Methods
emit
on
addListener
removeListener
bindThis
Methods

emit(type, event)

Trigger an event, sending to all downstream handlers listening for provided 'type' key.

Parameters
type
String
event type key (for example, 'click')
event
Object
event data
Returns
EventHandler
this

on(type, handler)

Bind a callback function to an event type handled by this object.

Parameters
type
String
event type key (for example, 'click')
handler
Function(string, Object)
callback
Returns
EventHandler
this

addListener()

Alias for "on".

removeListener(type, handler)

Unbind an event by type and handler. This undoes the work of "on".

Parameters
type
String
event type key (for example, 'click')
handler
Function
function object to remove
Returns
EventEmitter
this

bindThis(owner)

Call event handlers with this set to owner.

Parameters
owner
Object
object this EventEmitter belongs to